Spring-hinge.



No. 69|,55|. Patented Ian. 2|, ISUZ.

M. A. n.V KlNcAm.

SPRING HINGE.

(Applicaigon led Tm 14, 1901.)

(No Model) I s l I I I I gp/a o@ www( UNITED STATES PATENT EECE.

MICHAEL A. D. KINCAID, OF DALLAS, TEXAS.

SPRING-HINGE.

srncrrrcarrolv forming pare of-Laers Patent N0.e91,551,.1ate.1 January21', 1902. Application filed January 14,1901. Serial No. 43,243. (N0model.)

.To ali whom it may concern.:

Be it known that I, MICHAEL A. D. K1N- CAID, a citizen of the UnitedStates of America, residing at Dallas, the county of Dallas, State ofTexas, have invented a new and useful Improvement in Spring-Hinges, ofwhich the following is a specification. v

The object of this invention is to provide a door-hinge of simple anddurable construction swinging freely either way from a spring which isfast at one end, but adapted at the other to ride freely up and down thedoorjamb.

To this end the said invention consists in the construction andcombination of parts herinafter more particularly set forth and claimed.

In accompanying drawingsLFigure l represents a perspective view of ahinge embodying my invention. Fig. 2 represents an elevation of thesame, the joint being shown in vertical section and the spring beingomitted. Fig. 3 represents a horizontal section taken just above thejoint and showing the hinge mechanism in plan, and Fig. 4. represents aperspective detail view of the knuckle-plate.

Two upright plates 1 and 1, secured to the sides of the door 14a, areprovided at the rear corners thereof with two thimbles 2, which fit onvertical pins 3, headed above them at 4, the lower ends of these pinsbeing rigid, with a horizontal plate 6 extending transversely across therear edge of the door in contact therewith and into notches of the saidplates 1 and 1a. The rearwardly-presented edgev of this plate ispreferably curved,'as shown. A rearward-extending horizontal plate 7 ispivotally connected near its outer end to the said plate by a pin 8. Atension-rod 9"L is connected by a pivot-pin 10 to the rear part 9 of thesaid plate 7. The screw-threaded rear end of the said rod is passedthrough a supporting-spring 11 and receives a nut 12 on the other sideof the same,whereby the spring tension may be adj usted. This spring isfastened at its lower end 18a to the door-jamb 14h and curves upward inbow form to its free upper end, which is provided with a transversespindle 13, having antifriction-rollers 14. arranged to bear against thesaid jamb as the said free end of the spring slides up or down,accordingto the increasing or diminishing pull upon the said spring, theresistance whereof will depend on the tightening or loosening of thesaid nut. An angular bearing-plate 15 is fastened by screws 16 to thefront of said jamb, its projecting horizontal part being provided withtwo rounded indentations or undulatious 18, which receive thecylindrical thimbles 2 aforesaid, and with a broader interveningundulation or recess 18", which similarly receives the curved rear edgeof plate G.

When the door is closed, both of the thimbles rest in the uudulations 18and the rear edge of plate 6 rests in und ulation 18h. When it opens ineither direction, the thimble on that side turns in-the correspondingundulation orindentation, becoming the pivot of the door and being drawninto such contact by the strain of the said spring, which increases withsuch opening, while the spring is straightened against its resistanceand the lantifriction-rollers ride upward. The door is returnedfrom itsopen position to its closed or normal position by the reaction of thespring, the fixed or normal tension which it resumes when the door isclosed being sufficient to hold the door against accidental opening.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A spring fixed atits lower end to the inner face of a door-jamb andhaving its upper end free to slide up and Vdown thereon, in combinationwith the door member ofa swinghinge and intermediate devices pivotallyconf necting the middle of the said spring to the said door member.

2. A bearing-plate provided with curved indentations and attached to theouter face of a door-jamb in combination with a door member of a hingehaving curved parts toiit into such indentations, a spring attached tothe inner face of the door-jamb at one end and having the other end freeand provided with antifriction-rollers to slide up and down thereon anddevices pivotally connecting the said spring with the said door membersubstantially as set forth.

3. The door member of a hinge provided with curved bearing-surfaces ateach of its rear corners and in the rear space between IOO them, incombination with a bearing-plate having curved surfaces arranged to fitthe bearing-surfaces aforesaid, a spring attached to the inner face ofthe doorjamb and adjustable connections between said spring and binationwith a curved spring 1l adapted to be rigidly secured at one end to theinner face ot' a door-jamb and to bear at its free end on the said jamb,rollers mounted on the said free end and means for operativelyconnecting the said spring with the door member of the hinge, consistingof the plate 7 pivotally secured to the under side of the said plate Gand the tension-rod 9 pivotally secured to plate 7 adj ustably securedto the central portion of the said spring substantially as set forth.

MICHAEL A. D. KINCAID.

Witnesses:

C. M. BoLLEs, R. H. CAPERs.

